Method and Apparatus for Performing Call Switching

1. A method for switching between functions by a mobile device, the method comprising: performing, by the mobile device, a first function; receiving, by the mobile device, an event for a second function that is different from the first function, while performing the first function; outputting, by the mobile device, a notification corresponding to the event, in response to receiving the event; detecting, by the mobile device, a movement of the mobile device, after outputting the notification; determining, by the mobile device, whether the detected movement satisfies a predetermined condition; and performing, by the mobile device, the second function, in response to determining that the detected movement satisfies the predetermined condition.

2. The method of claim 1 , wherein performing the first function comprises establishing a first call with a first call user.

3. The method of claim 2 , wherein performing the second function comprises establishing a second call with a second call user.

4. The method of claim 3 , further comprising placing the first call on hold, before establishing the second call with the second call user.

5. The method of claim 3 , wherein establishing the second call with the second call user comprises answering an incoming call received from the second call user.

6. The method of claim 5 , further comprising displaying, by the mobile device, an indication of the incoming call received from the second call user.

7. The method of claim 3 , further comprising terminating the first call, before establishing the second call with the second call user.

8. The method of claim 1 , wherein performing the first function comprises: establishing a first call with a first call user; placing the first call on hold; and establishing a second call with a second call user.

9. The method of claim 8 , wherein performing the second function comprises resuming the first call with the first call user.

10. The method of claim 9 , further comprising placing the second call on hold, before resuming the first call with the first call user.

11. The method of claim 9 , further comprising terminating the second call, before resuming the first call with the first call user.

12. The method of claim 1 , wherein determining whether the movement of the mobile device satisfies the predetermined condition comprises: determining whether x and y components of three dimensional coordinates of the mobile device vary over first and second preset error ranges, respectively; determining whether a z component of the three dimensional coordinates of the mobile device varies within a third preset error range; and determining that the movement of the mobile device satisfies the predetermined condition, when the x and y components of the three dimensional coordinates of the mobile device vary over the first and second preset error ranges, respectively, and the z component varies within the third preset error range.

13. A mobile device comprising: a sensor that senses physical quantities related to a location of the mobile device; and a controller that: performs a first function, receives an event for a second function that is different from the first function, while the first function is being performed, outputs a notification corresponding to the event, in response to receiving the event, detects, based on the sensed physical quantities from the sensor, a movement of the mobile device, after outputting the notification, determines whether the detected movement satisfies a predetermined condition, and performs a second function, in response to determining that the detected movement satisfies the predetermined condition.

14. The mobile device of claim 13 , further comprising a transceiver, wherein the controller performs the first function by establishing a first call with a first call user via the transceiver.

15. The mobile device of claim 14 , wherein the controller performs the second function by establishing a second call with a second call user via the transceiver.

16. The mobile device of claim 15 , wherein the controller places the first call on hold, before establishing the second call with the second call user.

17. The mobile device of claim 15 , wherein the controller establishes the second call with the second call user by answering an incoming call received from the second call user.

18. The mobile device of claim 17 , further comprising a display that displays an indication of the incoming call received from the second call user.

19. The mobile device of claim 15 , wherein the controller terminates the first call, before establishing the second call with the second call user.

20. The mobile device of claim 13 , wherein the controller performs the first function by establishing a first call with a first call user, placing the first call on hold, and establishing a second call with a second call user.

21. The mobile device of claim 20 , wherein the controller performs the second function by resuming the first call with the first call user.

22. The mobile device of claim 21 , wherein the controller places the second call on hold, before resuming the first call with the first call user.

23. The mobile device of claim 21 , wherein the controller terminates the second call, before resuming the first call with the first call user.

24. The mobile device of claim 13 , wherein the controller determines whether the movement of the mobile device satisfies the predetermined condition by determining whether x and y components of three dimensional coordinates of the mobile device vary over first and second preset error ranges, respectively, determining whether a z component of the three dimensional coordinates of the mobile device varies within a third preset error range, and determining that the movement of the mobile device satisfies the predetermined condition, when the x and y components of the three dimensional coordinates of the mobile device vary over the first and second preset error ranges, respectively, and the z component varies within the third preset error range.